Each person can produce more than ______ versions of his/her own 46 chromosomes

Niche-picking is an example of a(n) __________ gene–environment correlation

A) passive B) evocative C) active D) dynamic

The Jets and the Sharks are two groups of local youths who regularly—and belligerently—compete against each other. The Robbers Cave experiment would suggest that one way of healing the rift between these groups is to

a. allow the youths to date each other. b. encourage them to "air" their differences. c. have them work together on a goal that requires cooperative efforts. d. have each group note the good qualities of the other group.